2004 INFINITI QX56 check oil

OVERHAUL
TF-111
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
46. Snap ring 47. Retaining pin 48. L-H fork
49. 2-4 fork 50. Shift fork spring 51. Fork guide
52. Retainer pin 53. Shift rod
1. Dust cover 2. Oil seal 3. Rear case
4. Air breather 5. Seal ring 6. Main oil pump cover
7. Inner gear 8. Outer gear 9. Main oil pump housing
10. D-ring 11. D-ring 12. Clutch piston
13. Thrust needle bearing race 14. Oil strainer 15. O-ring
16. Snap ring 17. Control valve assembly 18. Lip seal (7 pieces)
19. Washer 20. Filler plug 21. Filler stud
22. O-ring 23. Oil filter 24. ATP switch
25 Neutral-4LO switch 26. Oil pressure check plug 27. Harness bracket
28. Stem bleeder 29. Harness bracket 30. Center case
31. Mainshaft rear bearing 32. C-ring 33. Washer holder
34. Snap ring 35. Sub oil pump housing 36. Outer gear
37. Inner gear 38. Sub oil pump cover 39. O-ring
40. Transfer motor 41. Connector bracket
SDIA2091E

TF-118
CENTER CASE
Revision: August 20072004 QX56
10. Tap mainshaft, using suitable tool to remove it from clutch drum
and clutch hub.
11. Remove needle bearing and spacer from the mainshaft.
12. Remove the snap ring from the clutch hub.
CLUTCH PISTON
1. Remove oil pressure check plug from oil pressure check port.
2. Apply air gradually from oil pressure check port, and remove
clutch piston from center case.
SMT914C
WDIA0101E
SDIA2 115 E
SDIA2 116 E

FRONT CASE
TF-125
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
FRONT CASEPFP:33107
DisassemblyEDS00190
1. Remove rear case from center case. Refer to TF-112, "Disassembly" .
2. Remove the lock pin nut from the lock pin, using suitable tool.
a. Remove the lock pin.
3. Remove the oil seal from the front case, using suitable tool.
CAUTION:
Be careful not to damage the front case and shift cross.
4. Remove front case from center case.
SHIFT ROD COMPONENTS
1. Remove check plug, then check spring and check ball.
a. Remove wait detection switch.
SDIA2150E
SDIA2166E
SDIA2138E
SDIA2139E

FRONT CASE
TF-131
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
FRONT CASEPFP:33107
InspectionEDS00191
PLANETARY CARRIER

Measure end play of each pinion gear, and make sure the mea-
surement is within specification shown below. If out of specifica-
tion, replace planetary carrier assembly with new one.

Check working face of each gear, bearing and others for dam-
age, burrs, partial wear, dents and other abnormality. If any is
found, replace planetary carrier assembly with new one.
SUN GEAR

Check if oil passage of sun gear assembly is clogged. For this,
try to pass a 3.6 mm (0.142 in) dia. wire through oil passage as
shown.

Check sliding/contact surface of each gear, bearing and others
for damage, burrs, partial wear, dents, and other abnormality. If
any is found, replace sun gear assembly with new one.
INTERNAL GEAR

Check internal gear teeth for damage, partial wear, dents and
other abnormality. If any is found, replace internal gear with new
one.
SHIFT ROD COMPONENTS

Check working face of shift rod and fork for wear, partial wear,
bending and other abnormality. If any is found, replace with new
one.Pinion gear end play : 0.1 - 0.7 mm (0.004 - 0.028 in)
PDIA0185E
PDIA0186E
SMT008D
SMT009D

CENTER CASE
TF-133
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
CENTER CASEPFP:33105
InspectionEDS00192
BEARINGS
1. Make sure bearings roll freely and are free from noise, pitting
and cracks.
SUB-OIL PUMP
1. Check inner and outer circumference, tooth face, and side-face
of inner and outer gears for damage or abnormal wear.
2. Measure side clearance between sub oil pump housing edge
and inner gear/outer gear.
3. Make sure side clearance is within specification. If the measure-
ment is out of specification, replace inner and outer gears
together with new ones as a set.
MAIN OIL PUMP
1. Check inner and outer circumference, tooth face, and side-face
of inner and outer gears for damage or abnormal wear.
2. Measure side clearance between main oil pump housing edge
and inner gear/outer gear.
3. Make sure side clearance is within specification. If the measure-
ment is out of specification, replace inner and outer gears with
new ones as a set.
MAINSHAFT

Check surfaces which contact sun gear, clutch drum, clutch hub,
press flange, clutch piston, each bearing, etc. for damage, peel,
partial wear, dents, bending, or other abnormal damage. If any is
found, replace with new one.
SDIA2175E
Specification : 0.015 - 0.035 mm (0.0006 - 0.0014 in)
SDIA2173E
Specification : 0.015 - 0.035 mm (0.0006 - 0.0014 in)
SDIA2174E
SMT944C

CENTER CASE
TF-145
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
4. Remove all the liquid gasket from oil pressure check port and
inside center case. With the new oil pressure check plug
threaded in 1 or 2 pitches, apply specified sealant or equivalent,
to the oil pressure check plug thread of plug, and tighten. Refer
to GI-45, "
Recommended Chemical Products and Sealants" .
NOTE:
Do not reuse oil pressure check plug.
5. Install mainshaft and clutch drum. Refer to TF-145, "
MAIN-
SHAFT AND CLUTCH DRUM" .
MAINSHAFT AND CLUTCH DRUM
1. Apply ATF or petroleum jelly to needle bearing, and install nee-
dle bearing, clutch drum, clutch hub and new snap ring to main-
shaft.
2. Install new snap ring to the clutch hub, using suitable tool.
NOTE:
Do not reuse snap ring.
3. Install new snap ring to clutch hub from clutch hub to mainshaft,
and secure them with snap rings.
NOTE:
Do not reuse snap rings.Oil pressure check plug : 15 N·m (1.5 kg-m, 11 in-lb)
SMT915C
SMT974C
WDIA0101E
SDIA2192E

SERVICE DATA AND SPECIFICATIONS (SDS)
TF-153
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
General SpecificationsEDS0031B
Inspection and AdjustmentEDS0031C
CLEARANCE BETWEEN INNER GEAR AND OUTER GEAR
Unit: mm (in)
CLUTCH
Unit: mm (in)
PINION GEAR END PLAY
Unit: mm (in)
CLEARANCE BETWEEN SHIFT FORK AND SLEEVE
Unit: mm (in)
SELECTIVE PARTS
Sub-oil Pump
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.
Main Oil Pump
Unit: mm (in) Applied modelVK56DE
Transfer modelATX14B
Fluid capacity (Approx.)
(US qt, lmp qt)3.0 (3-1/8, 2-5/8)
Gear ratioHigh 1.000
Low 2.596
Number of teethPlanetary
gearSun gear 57
Internal gear 91
Front drive sprocket 38
Front drive shaft 38
Item Specification
Sub-oil pump 0.015 - 0.035 (0.0006 - 0.0014)
Main oil pump 0.015 - 0.035 (0.0006 - 0.0014)
Item Limit value
Drive plate1.4 (0.055)
Item Standard
Pinion gear end play 0.1 - 0.7 (0.004 - 0.028)
Item Standard
Shift fork and sleeve Less than 0.36 (0.0142)
Gear thicknessPart number*
Inner gear Outer gear
9.27 - 9.28 (0.3650 - 0.3654) 31346 0W462 31347 0W462
9.28 - 9.29 (0.3654 - 0.3657) 31346 0W461 31347 0W461
9.29 - 9.30 (0.3657 - 0.3661) 31346 0W460 31347 0W460
Gear thicknessPart number*
Inner gear Outer gear
8.27 - 8.28 (0.3256 - 0.3260) 31346 7S112 31347 7S112
8.28 - 8.29 (0.3260 - 0.3264) 31346 7S111 31347 7S111
8.29 - 8.30 (0.3264 - 0.3268) 31346 7S110 31347 7S110